Viper DS350 17" Dual Speed Professional Cleaning MachineViper DS350 17" Dual Speed Cleaning Machine 50000302 Viper DS350 Dual speed single disc machine that is easy to operate and effective. The DS350 is the ideal tool for heavy duty cleaning and scrubbing hard floors. ideal for everyday indoor cleaning of hotels, restaurants, cafeterias, schools, malls, convention centres, as well as public buildings like schools and government offices. The Viper DS350 is a dual speed single disc machine that may be used